通过计算瞬时应变的大小与屈服限建立粘弹性变形和粘塑性变形的判断准则。
Under the instantaneous strain and yield limit calculated, judgement rule about viscoelastic and viscoplastic is established.
另外，应力与瞬时应变线性拟合结果表明，瞬时轴向应变与轴向荷载近似成比例增长。
In addition, results of the linear regression for stress and instantaneous strain show that the instantaneous axial strain and axial load approximated to grow proportionally.
采用该方法不仅可以分析弯管成形过程瞬时应变状态及其演化过程，而且可以分析弯管成形过程变形特点。
Adopting this method not only can analyze instantaneous strain condition and evolution during tube bending, but also can analyze deforming feature.
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